Finding out the ContentType of a Image from the byte[]

Is there a way to find out what the ContentType of an image is from only the original bytes?

At the moment I have a database column that stores only the byte[], which I use to display an image on a web page.

MemoryStream ms = new MemoryStream(imageBytes);
Image image = Image.FromStream(ms);
image.Save(context.HttpContext.Response.OutputStream, <--ContentType-->);

I could of course just save the ContentType in another column in the table, but just wondered if there was another way e.g. maybe .Net has a way to interrogate the data to get the type.